This is my first post here an I was hoping someone could help me out.I have a non-functioning Carver TFM-35. I have noticed on the PCB board few burned ressistors and transistors. One of the transistors exploded (q216) badly and I am looking for replacement. The original transistor is 2SC2240 with following specs:Collector-base voltage VCBO 120 Collector-emitter voltage VCEO 120 Emitter-base voltage VEBO 5 Collector current IC 100 mA Base current IB 20 mA Collector power dissipation PC 300 mW Junction temperature Tj 125 °C

These are no longer in production and I was going to replace it with KSC1845 that has the same pinouts and very close specs. The only difference is IC and IB. Here they are:Collector-base voltage VCBO 120 Collector-emitter voltage VCEO 120 Emitter-base voltage VEBO 5 Collector current IC 50 mA IB Base Current 10 mAPC Collector Power Dissipation 500 mWTJ Junction Temperature 150 °C

Would it be ok, to use KSC1845 here as a replacement even though they are not identical?

I have never heard of MCM Electronics before. I usually order parts from Mouser or Digi-Key. However I love how they find a suitable replacement. Thank you. I also ordered the other 2 mentioned by me in first post, since I was unable to find anything better before you pointed out to MCM Electronics. I wonder if I could still use one of them instead.

Unfortunately after replacing 2 transistors (q216, q218) and 2 resistors (R244, R246) and all the caps, I have plugged it in to the power and got a sparks and smoke from exact the same area on the PCB (q216, q218) and (R244, R246).

There must be some other component that is causing this failure. It seem to be only on 1 side. I am getting little frustrated. Can anyone give me some clues what else should I be checking ?

ok. you need to go check the bank account and if it agrees with you, you then send the amp to tom at vintage hifi. if your on the west coast, then rolland might better. there is an entire procedure that you can go through using the 1.0 service manual as a rule of thumb to go by and the carversite members as quides to the tougher questions. otherwise send it to me, and i will pick at it in my very rare spare time with no promice of i got it. cheers and welcome.

I intendent to send it out to service center originally, but then after sending emails to few places around (NY State) and not getting any response, I decided to just figure it out myself. I printed out service manual and attempted to replace components that were burned out. I also replaced all the capacitors. I am new to soldering and electronics in general. However I do have computer degree (software) and I was hoping to get this as a fun project to learn. Right now, it's not so much about the money, but learning experience for me. I probably need to dig deeper in service manual. Was hoping to find someone with similar problems and get some clues from this forum on what should I focus on most. Thanks for suggesting Vintage Hi FI place. I'll definetly give them a call in case I can't figure out anything else.

I intendent to send it out to service center originally, but then after sending emails to few places around (NY State) and not getting any response, I decided to just figure it out myself. I printed out service manual and attempted to replace components that were burned out. I also replaced all the capacitors. I am new to soldering and electronics in general. However I do have computer degree (software) and I was hoping to get this as a fun project to learn. Right now, it's not so much about the money, but learning experience for me. I probably need to dig deeper in service manual. Was hoping to find someone with similar problems and get some clues from this forum on what should I focus on most. Thanks for suggesting Vintage Hi FI place. I'll definetly give them a call in case I can't figure out anything else.

Hello, you have meet that person, me. Lol . I have 5 Tfm35's and replaced all caps as well. I had one amp thought that just kept kicking my butt. Replace this work for a long while then smoke. Once twice. Then I said, I will swap out all components . Even worse mistake as somehow I got a transistor backwards here and there Tom at vintage hifi told me. So now I have a 55 that I will peek at as it has an issue even thought it worked when i stopped using it. i can say it will most likely go to Tom as I must have done some wrong there as well. Or not. Either way, I love the amp, so I will not try to be a tech beyond my reach. Toms shop is the carver shop for all intense purposes.

I have sent my amp at the end of February to Vintage HiFi and that's the last time I have seen it.I have been calling and sending email to the shop and first I got some answers they have been really busy and were unable to look at it yet. Now, I get no responses neither by email nor phone calls.I really hope that I can still get it back . Not sure what to do.

It is best to call tom at Vintage HiFi on a weekend during the evening . I do know that he is backed up as far as repairs. He had my Sunfire for 6 months so dont worry he will get to it and it will be as good as new when he is done.